The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2014
Filed:
Sep. 09, 2010
Hirokazu Morii, Tokyo, JP;
Hyoji Yoshimura, Nagoya, JP;
Hirokazu Morii, Tokyo, JP;
Hyoji Yoshimura, Nagoya, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Yoshimura Company, Nagoya-Shi, JP;
Abstract
Disclosed is a method—for producing an engine valve (V) filled with metallic sodium (Na) within by means of: forming a stem section (S), which has a hollow section (H), at an intended size by successively drawing the stem section (S) using dies (DDDx, Dx+1, Dn) in a manner so as to causing the size of the outer diameter and the inner diameter of the stem section (S) to contact in a stepwise fashion; and inserting metallic sodium (Na) into the hollow section (H) of the stem section (S)—wherein after drawing the stem section (S) until the inner diameter of the hollow section (H) of the stem section (S) has become a prescribed size (steps S-S) and then inserting the block-shaped solid metallic sodium (Na) into the hollow section (H) of the stem section (S) (step S), the stem section (S) is further drawn (steps Sand S).